Taken from the contest brief:

"The most important factor for this cover is that it be sexy. (When I say sexy, I don't mean literal sexiness. The audience is somewhat religious, so stay away from naked people.) It can be ornate and detailed, or it can be blank and simple. The most important part is that be attractive and that you make people want to pick it up. I want to go with styles that are very modern, cover styles that might be on the best seller list, or on books in airport shops. Catchy and beautiful."